Parker VRD355 Series

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IA VRD UK.INDD RH 02.06

Digital Power Ampliﬁer

Series VRD350 and VRD355Installation Manual

Parker Hanniﬁn GmbH & Co. KG

Hydraulic Controls Division

Transfer contents

Value is transfered. The

previously selected address

appears again.

Programming Instructions for H-Values

(Command Signal Simulation)

Select mode

Select mode U1

Select mode H1

First press key "E", then

press key "M" simultane-

ously.

Select address

Display, alter, transfer

contents

Select new address or return to mode U1 with the "M"-key.

Basic Settings

All parameters are preset ex-works according to the

intended application of the ampliﬁer. This setting

depends on the type of ampliﬁer (see also type

code). This basic setting can be recovered from

memory by pressing the 4 keys at the same time up

to 10 seconds after the supply voltage is switched

on. During recovery the display shows “HHH“.

After leaving H mode, auxiliary com-

mand signals are no longer utilized but

remain in the background. They must be

set back to zero after commissioning.

After supply voltage is disconnected, H parameter

settings are lost.

H1 or H2

Same procedure as for U, S and P-values. See

Setting parameters does not alter the preset values.

Customized parameters are overwritten by the re-

covery operation. Further information on adjusting

the basic settings can be found in the instructions

for the control program PROVRD 350/355.

Parker VRD355 Series - Page 14